The globular cluster Messier 10 (NGC 6254) in the constellation Ophiuchus on May 21 / 22, 2020. Messier 10
is the second brightest globular cluster in Ophiuchus and is estimated to be 14,300 light-years away from Earth. Its spatial diameter is approximately 83 light-years.
Messier 10 was discovered by French astronomer Charles Messier in 1764 (source: Wikipedia).
Twenty-three 3 minute exposures at ISO 800 were added for this shot with the DeepSkyStacker software (resulting in a 1 hour 15 minute exposure)
and the final image processing was done in Photoshop.
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Equipment: Canon EOS 450D Baader modified camera, TeleVue Paracorr Type II coma corrector,
16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform,
Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison:
image of the moon with the same equipment).
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